The Valve,ball, cataloged under National Stock Number 4820-01-725-8520, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Inventory Control Point Mechanicsburg. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Valve,ball |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Naval Inventory Control Point Mechanicsburg (CAGE 03950) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-725-8520 |
| Primary Part Number | 845-7286651 ASSY IRG-WL1 |
| Item Name | Valve,ball |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| 845-7286651 ASSY IRG-WL1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 2643-825-91 ASSY IRG-WL1 | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 2643-825-91 ASSY IRG-W | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 845-7286651 ASSY IRG-W | 3/1 Design control — primary reference Naval Sea Systems Command |
| 7286651/ACC DOC2643-825-91D3 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 4820-01-725-8520 is a Valve,ball, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-725-8520 has 2 manufacturer part numbers on file: 845-7286651 ASSY IRG-WL1 (Naval Inventory Control Point Mechanicsburg), 2643-825-91 ASSY IRG-WL1 (Naval Inventory Control Point Mechanicsburg).
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.